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Post-Employment Benefits - Summary of Pension Costs for Defined Contribution Plans and Defined Benefit Plans (Detail) - SEK (kr) kr in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of Defined Benefit Plans Expense Recognized In Income Statement [line items] |  |  |
Pension cost for defined contribution plans | kr 3,610 | kr 3,464 | kr 3,071
Pension cost for defined benefit plans | 2,895 | 3,179 | 3,486
Total | kr 6,505 | kr 6,643 | kr 6,557
Total pension cost expressed as a percentage of wages and salaries | 8.30% | 7.80% | 8.90%
Sweden [member] |  |  |
Disclosure of Defined Benefit Plans Expense Recognized In Income Statement [line items] |  |  |
Pension cost for defined contribution plans | kr 1,306 | kr 1,223 | kr 1,192
Pension cost for defined benefit plans | 1,624 | 2,013 | 2,144
Total | 2,930 | 3,236 | 3,336
US [member] |  |  |
Disclosure of Defined Benefit Plans Expense Recognized In Income Statement [line items] |  |  |
Pension cost for defined contribution plans | 500 | 522 | 542
Pension cost for defined benefit plans | 79 | 67 | 160
Total | 579 | 589 | 702
United Kingdom [member] |  |  |
Disclosure of Defined Benefit Plans Expense Recognized In Income Statement [line items] |  |  |
Pension cost for defined contribution plans | 178 | 148 | 128
Pension cost for defined benefit plans | (56) | (67) | (22)
Total | 122 | 81 | 106
Other Countries [member] |  |  |
Disclosure of Defined Benefit Plans Expense Recognized In Income Statement [line items] |  |  |
Pension cost for defined contribution plans | 1,626 | 1,571 | 1,209
Pension cost for defined benefit plans | 1,248 | 1,166 | 1,204
Total | kr 2,874 | kr 2,737 | kr 2,413

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- Definition Post-employment benefit expense including settlement (gain) loss and net interest (income) loss defined benefit plans. + References No definition available. + Details
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- Definition The amount of post-employment benefit expense relating to defined contribution plans. Defined contribution plans are post-employment benefit plans under which an entity pays fixed contributions into a separate entity (a fund) and will have no legal or constructive obligation to pay further contributions if the fund does not hold sufficient assets to pay all employee benefits relating to employee service in the current and prior periods. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 53 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_53&doctype=Standard -URIDate 2024-03-27 + Details
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